fs/nullfs/null_vnops.c

235 	 * We require at least one vp.
239 		panic ("null_bypass: no vp's in map");
256 		 * that aren't.  (We must always map first vp or vclean fails.)
266 			 * of vrele'ing their vp's.  We must account for
315 		 * XXX - even though some ops have vpp returned vp's,
335 	struct vnode *lvp, *vp;
338 	vp = ap->a_vp;
339 	lvp = NULLVPTOLOWERVP(vp);
340 	KASSERT(vp->v_writecount + ap->a_inc >= 0, ("wrong writecount inc"));
341 	if (vp->v_writecount > 0 && vp->v_writecount + ap->a_inc == 0)
343 	else if (vp->v_writecount == 0 && vp->v_writecount + ap->a_inc > 0)
348 		vp->v_writecount += ap->a_inc;
363 	struct vnode *vp, *ldvp, *lvp;
374 	vp = lvp = NULL;
387 			error = null_nodeget(dvp->v_mount, lvp, &vp);
389 				*ap->a_vpp = vp;
399 	struct vnode *vp, *ldvp;
401 	vp = ap->a_vp;
402 	ldvp = NULLVPTOLOWERVP(vp);
405 		vp->v_object = ldvp->v_object;
415 	struct vnode *vp = ap->a_vp;
421 	    (vp->v_mount->mnt_flag & MNT_RDONLY))
424  		switch (vp->v_type) {
441 			if (vp->v_mount->mnt_flag & MNT_RDONLY)
470 	struct vnode *vp = ap->a_vp;
479 		switch (vp->v_type) {
483 			if (vp->v_mount->mnt_flag & MNT_RDONLY)
496 	struct vnode *vp = ap->a_vp;
505 		switch (vp->v_type) {
509 			if (vp->v_mount->mnt_flag & MNT_RDONLY)
588 	struct vnode *vp = ap->a_vp;
596 		VI_LOCK(vp);
599 	nn = VTONULL(vp);
605 	if (nn != NULL && (lvp = NULLVPTOLOWERVP(vp)) != NULL) {
607 		VI_UNLOCK(vp);
628 		if (VTONULL(vp) == NULL && error == 0) {
660 	struct vnode *vp = ap->a_vp;
669 	else if (mtx_owned(VI_MTX(vp)) == 0) {
670 		VI_LOCK(vp);
673 	nn = VTONULL(vp);
674 	if (nn != NULL && (lvp = NULLVPTOLOWERVP(vp)) != NULL) {
678 		VI_UNLOCK(vp);
682 			VI_LOCK(vp);
685 			VI_UNLOCK(vp);
700 	struct vnode *vp, *lvp;
705 	vp = ap->a_vp;
706 	xp = VTONULL(vp);
707 	lvp = NULLVPTOLOWERVP(vp);
708 	mp = vp->v_mount;
719 		vp->v_object = NULL;
720 		vrecycle(vp, curthread);
732 	struct vnode *vp;
736 	vp = ap->a_vp;
737 	xp = VTONULL(vp);
740 	KASSERT(lowervp != NULL && vp->v_vnlock != &vp->v_lock,
741 	    ("Reclaiming inclomplete null vnode %p", vp));
748 	lockmgr(&vp->v_lock, LK_EXCLUSIVE, NULL);
749 	VI_LOCK(vp);
750 	vp->v_data = NULL;
751 	vp->v_object = NULL;
752 	vp->v_vnlock = &vp->v_lock;
753 	VI_UNLOCK(vp);
760 	if (vp->v_writecount > 0)
774 	struct vnode *vp = ap->a_vp;
776 	printf("\tvp=%p, lowervp=%p\n", vp, VTONULL(vp)->null_lowervp);
786 	struct vnode *vp;
788 	vp = ap->a_vp;
789 	VI_LOCK(vp);
790 	xp = VTONULL(vp);
793 		VI_UNLOCK(vp);
799 		VI_UNLOCK(vp);
817 	struct vnode *vp = ap->a_vp;
823 	if (vp->v_type == VDIR)
826 	locked = VOP_ISLOCKED(vp);
827 	lvp = NULLVPTOLOWERVP(vp);
829 	VOP_UNLOCK(vp, 0); /* vp is held by vn_vptocnp_locked that called us */
835 		vn_lock(vp, locked | LK_RETRY);
846 		vn_lock(vp, locked | LK_RETRY);
850 	error = null_nodeget(vp->v_mount, ldvp, dvp);
857 	vn_lock(vp, locked | LK_RETRY);